Water heating and cooling device suitable for greenhouse irrigation

Abstract

The utility model discloses a water heating and cooling device suitable for greenhouse irrigation. The heating and cooling device comprises a heat exchanger, a secondary pure water side water inlet pipeline, a secondary pure water side water outlet pipeline, a primary hot water side water inlet pipeline, a primary ice water side water inlet pipeline, a primary hot water side water outlet pipeline and a primary ice water side water outlet pipeline; the device can adapt to temperature changes in different seasons, especially in regions with high temperature in summer and autumn and low temperature in winter, the temperature of the heat exchange medium is adjusted, the irrigation water temperature is kept stable, and therefore the influence of environment changes on plant growth is reduced; the fluctuation of the temperature of irrigation water is reduced through accurate temperature control, and physiological pressure, such as heat stress or cold damage, caused by temperature mutation to plants is avoided; by controlling the temperature of the irrigation water, the problem of water evaporation or insufficient water absorption of plants caused by uncomfortable temperature can be reduced, so that the utilization rate of the irrigation water is improved.

Description

Technical Field

[0001] This disclosure belongs to the field of greenhouse planting technology, specifically relating to a device for raising and lowering the temperature of irrigation water in greenhouses. Background Technology

[0002] Depending on the plant variety and its different growth stages, the irrigation water temperature should be controlled between 20-24℃ to ensure optimal plant growth. In southern my country, strong sunlight and high temperatures are common during the summer and autumn. According to statistics and monitoring, the tap water temperature in Zhuhai reaches 30℃ in summer and is around 10℃ in winter.

[0003] Therefore, in order to address the above problems, this utility model urgently needs to provide a water and fertilizer irrigation water temperature raising and lowering device for modern agricultural glass greenhouse planting technology. Utility Model Content

[0004] The purpose of this disclosure is to provide a device for raising and lowering the temperature of irrigation water in greenhouses. This device is designed for use in modern agricultural glass greenhouse planting technology to solve the technical problem that existing irrigation water experiences large temperature fluctuations due to seasonal changes, which cannot guarantee the healthy growth of plants.

[0005] The first aspect of this disclosure provides a device for raising and lowering the temperature of irrigation water in greenhouses. The device includes a heat exchanger, a secondary pure water inlet pipe, a secondary pure water outlet pipe, a primary hot water inlet pipe, a primary chilled water inlet pipe, and a primary hot water outlet pipe. The secondary pure water inlet pipe is connected to the secondary inlet of the heat exchanger, the secondary pure water outlet pipe is connected to the secondary outlet of the heat exchanger, the primary hot water inlet pipe is connected to the primary hot water inlet of the heat exchanger, and the primary chilled water inlet pipe is connected to the primary hot water outlet of the heat exchanger. The pipeline is connected to the primary side chilled water inlet of the heat exchanger, the primary hot water outlet pipeline is connected to the primary side hot water outlet of the heat exchanger, and the primary chilled water outlet pipeline is connected to the primary side chilled water outlet of the heat exchanger. RO pure water enters the heat exchanger through the secondary pure water inlet pipeline, and exchanges heat with the hot water through the primary hot water inlet pipeline or the chilled water through the primary chilled water inlet pipeline. The RO pure water undergoes a primary temperature rise and fall treatment, and the pure water after heat exchange or cooling flows out through the secondary pure water outlet pipeline and is introduced into the pure water tank for use in irrigating greenhouse plants.

[0006] Optionally, the secondary pure water inlet pipe is equipped with a thermometer and a pressure gauge, and the thermometer and pressure gauge are respectively connected to the secondary inlet of the heat exchanger to monitor the temperature and pressure of the pure water entering the heat exchanger.

[0007] Optionally, the secondary pure water outlet pipe is equipped with a thermometer and a pressure gauge, and the thermometer and pressure gauge are respectively connected to the secondary outlet of the heat exchanger to monitor the temperature and pressure of the pure water leaving the heat exchanger.

[0008] Optionally, both the primary hot water inlet pipe and the primary chilled water inlet pipe are equipped with a thermometer, a pressure gauge, and an electric three-way valve. The thermometer and pressure gauge are respectively connected to the primary hot water inlet and the primary chilled water inlet of the heat exchanger, and the electric three-way valve is used to control the flow rate of hot water and chilled water into the heat exchanger.

[0009] Optionally, both the primary hot water outlet pipe and the primary chilled water outlet pipe are equipped with a thermometer and a pressure gauge, and the thermometer and pressure gauge are respectively connected to the primary hot water outlet and the primary chilled water outlet of the heat exchanger to monitor the temperature and pressure of the hot water and chilled water leaving the heat exchanger.

[0010] Optionally, the heat exchanger is a plate heat exchanger, which has multiple parallel heat exchange plates forming fluid channels between the plates to achieve heat exchange between the primary fluid and the secondary pure water fluid.

[0011] Optionally, the primary hot water inlet pipe and the primary chilled water inlet pipe are respectively connected to different heat exchange medium storage tanks to regulate the temperature of the heat exchange medium entering the heat exchanger.

[0012] Optionally, the device includes connecting pipes, wherein the primary hot water inlet pipe and the primary chilled water inlet pipe are connected to their respective heat exchange medium storage tanks via connecting pipes, and the primary hot water outlet pipe and the primary chilled water outlet pipe are connected to the corresponding outlets of the heat exchanger via connecting pipes.

[0013] Optionally, the heating and cooling device also includes an electrical control system, which is mounted on a modular mounting base plate connected to the heat exchanger. The mounting base plate is used to fix and support the various components in the electrical control system and to control the electric three-way valve and water pump by monitoring sensor data in the heating and cooling device to regulate the flow rate of the heat exchange medium and pure water.

[0014] Optionally, the electronic control system also includes a thermal management unit that monitors the temperature of the heat exchanger to ensure that the device operates at the optimal temperature.

[0015] The main technical effects achieved by the embodiments of this disclosure are: the device can adapt to temperature changes in different seasons, especially in areas with high temperatures in summer and autumn and low temperatures in winter. By adjusting the temperature of the heat exchange medium, it maintains a stable irrigation water temperature, thereby reducing the impact of environmental changes on plant growth; precise temperature control reduces fluctuations in irrigation water temperature, avoiding physiological stress on plants caused by sudden temperature changes, such as heat stress or cold damage; by controlling the temperature of irrigation water, it can reduce the problem of water evaporation or insufficient water absorption by plants due to unsuitable temperature, thereby improving the utilization rate of irrigation water. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a device for raising and lowering the temperature of irrigation water in greenhouses, as described in this disclosure.

[0017] Explanation of reference numerals in the attached diagram: 1. Heat exchanger; 2. Secondary pure water side inlet pipe; 3. Secondary pure water side outlet pipe; 4. Primary hot water side inlet pipe; 5. Primary chilled water side inlet pipe; 6. Primary hot water side outlet pipe; 7. Primary chilled water side outlet pipe. Detailed Implementation

[0018] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The manner described in the following exemplary embodiments does not represent all manner consistent with this disclosure. Rather, they are merely examples of apparatuses consistent with some aspects of this disclosure as detailed in the appended claims.

[0019] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. Unless otherwise defined, the technical or scientific terms used in this disclosure should be understood in their ordinary sense by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure and the claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “a” or “one,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one, which will be separately stated if referring only to “a.” “A plurality” or “several” means two or more. Unless otherwise indicated, the terms “front,” “rear,” “lower,” and / or “upper,” and similar terms are for ease of description only and are not limited to a location or spatial orientation. The terms “comprising,” “including,” or “including,” and similar terms mean that the elements or objects preceding “comprising” or “including” encompass the elements or objects listed following “comprising” or “including” and their equivalents, but do not exclude other elements or objects. The terms “connection” or “link” are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The singular forms “a,” “the,” and “the” used in this disclosure and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0020] like Figure 1 As shown, the first aspect of this disclosure provides a device for raising and lowering the temperature of irrigation water in greenhouses. The device includes a heat exchanger 1, a secondary pure water inlet pipe 2, a secondary pure water outlet pipe 3, a primary hot water inlet pipe 4, a primary chilled water inlet pipe 5, a primary hot water outlet pipe 6, and a primary chilled water outlet pipe 7. The secondary pure water inlet pipe 2 is connected to the secondary inlet of the heat exchanger 1, the secondary pure water outlet pipe 3 is connected to the secondary outlet of the heat exchanger 1, the primary hot water inlet pipe 4 is connected to the primary hot water inlet of the heat exchanger 1, and the primary chilled water outlet pipe 7 is connected to the primary outlet of the heat exchanger 1. Water pipe 5 is connected to the primary side chilled water inlet of heat exchanger 1, primary hot water outlet pipe 6 is connected to the primary side hot water outlet of heat exchanger 1, and primary chilled water outlet pipe 7 is connected to the primary side chilled water outlet of heat exchanger 1. RO pure water enters heat exchanger 1 through secondary pure water inlet pipe 2, and exchanges heat with hot water through primary hot water inlet pipe 4 or chilled water through primary chilled water inlet pipe 5 through heat exchanger 1 to perform a primary heating and cooling treatment on the RO pure water. The resulting pure water, after heat exchange or cooling, flows out through secondary pure water outlet pipe 3 and is introduced into a pure water tank for use in irrigating greenhouse plants.

[0021] This device can adapt to temperature changes in different seasons, especially in areas with higher temperatures in summer and autumn and lower temperatures in winter. By adjusting the temperature of the heat exchange medium, it maintains a stable irrigation water temperature, thereby reducing the impact of environmental changes on plant growth. Precise temperature control reduces fluctuations in irrigation water temperature, avoiding physiological stress on plants caused by sudden temperature changes, such as heat stress or cold damage. By controlling the temperature of the irrigation water, it can reduce water evaporation or insufficient water absorption by plants due to unsuitable temperatures, thereby improving the utilization rate of irrigation water.

[0022] As an optional implementation, a thermometer and a pressure gauge are installed on the secondary pure water inlet pipe 2, and the thermometer and pressure gauge are respectively connected to the secondary side inlet of the heat exchanger 1 to monitor the temperature and pressure of the pure water entering the heat exchanger 1. Installing a thermometer and pressure gauge on the secondary pure water inlet pipe 2 allows for real-time monitoring of the temperature and pressure of the pure water entering the heat exchanger 1, ensuring that the temperature and pressure of the water before entering the heat exchanger 1 meet the set requirements, thereby improving heat exchange efficiency and system safety.

[0023] As an optional implementation, a thermometer and a pressure gauge are installed on the secondary pure water outlet pipe 3, and the thermometer and pressure gauge are respectively connected to the secondary outlet of the heat exchanger 1 to monitor the temperature and pressure of the pure water leaving the heat exchanger 1. Installing a thermometer and pressure gauge on the secondary pure water outlet pipe 3 allows for monitoring of the temperature and pressure of the pure water after heat exchange, ensuring that the outlet water temperature meets the irrigation requirements of the plants, and simultaneously monitoring the system pressure to ensure stable system operation.

[0024] As an optional implementation, both the primary hot water inlet pipe 4 and the primary chilled water inlet pipe 5 are equipped with a thermometer, a pressure gauge, and an electric three-way valve. The thermometer and pressure gauge are connected to the primary hot water inlet and the primary chilled water inlet of the heat exchanger 1, respectively. The electric three-way valve is used to control the flow rate of hot water and chilled water entering the heat exchanger 1. The installation of the thermometer, pressure gauge, and electric three-way valve on the primary hot water inlet pipe 4 and the primary chilled water inlet pipe 5 allows for precise control of the flow rate of hot water and chilled water entering the heat exchanger 1, enabling precise regulation of the irrigation water temperature and meeting the water temperature requirements of plants at different growth stages.

[0025] As an optional implementation, both the primary hot water outlet pipe 6 and the primary chilled water outlet pipe 7 are equipped with a thermometer and a pressure gauge, respectively. These gauges are connected to the primary hot water outlet and the primary chilled water outlet of the heat exchanger 1 to monitor the temperature and pressure of the hot and chilled water leaving the heat exchanger 1. Installing thermometers and pressure gauges on the primary hot water outlet pipe 6 and the primary chilled water outlet pipe 7 allows for monitoring of the temperature and pressure of the hot and chilled water leaving the heat exchanger 1, ensuring the effective utilization of the heat exchange medium and system safety.

[0026] As an optional implementation, the heat exchanger 1 is a plate heat exchanger 1, which has multiple parallel heat exchange plates forming fluid channels between them for heat exchange between the primary fluid and the secondary pure water fluid. The design of the plate heat exchanger 1, with multiple parallel heat exchange plates forming fluid channels, increases the heat exchange area, improves heat exchange efficiency, and reduces energy consumption.

[0027] As an optional implementation, the primary hot water inlet pipe 4 and the primary chilled water inlet pipe 5 are respectively connected to different heat exchange medium storage tanks to regulate the temperature of the heat exchange medium entering the heat exchanger 1. By connecting the primary hot water inlet pipe 4 and the primary chilled water inlet pipe 5 to different heat exchange medium storage tanks, the temperature of the heat exchange medium can be flexibly adjusted according to changes in ambient temperature to meet irrigation needs under different seasons and climatic conditions.

[0028] As an optional implementation, the device includes connecting pipes, wherein the primary hot water inlet pipe 4 and the primary chilled water inlet pipe 5 are connected to their respective heat exchange medium storage tanks via connecting pipes, and the primary hot water outlet pipe 6 and the primary chilled water outlet pipe 7 are connected to their respective outlets of the heat exchanger 1 via connecting pipes. Connecting the heat exchange medium storage tanks to the heat exchanger 1 via connecting pipes enables the recycling of the heat exchange medium, improving the system's heat exchange efficiency and overall performance.

[0029] As an optional implementation, the heating and cooling device also includes an electrical control system. The electrical control system is mounted on a modular mounting base connected to the heat exchanger 1, serving to fix and support the various components within the electrical control system. It controls the electric three-way valve and water pump by monitoring sensor data within the heating and cooling device to regulate the flow rates of the heat exchange medium and pure water. The integrated electrical control system, mounted on the modular mounting base and connected to the heat exchanger 1, allows for centralized control and monitoring of the entire heating and cooling device's operating status. By controlling the electric three-way valve and water pump through sensor data, it achieves precise regulation of the heat exchange medium and pure water flow rates, improving the system's automation level and ease of operation.

[0030] As an optional implementation, the electrical control system also includes a thermal management unit that monitors the temperature of heat exchanger 1 to ensure the device operates at the optimal temperature. The thermal management unit in the electrical control system monitors the temperature of heat exchanger 1, ensuring the device operates at the optimal temperature, improving heat exchange efficiency, and guaranteeing the stability of irrigation water temperature, thereby providing a suitable growth environment for the plants.

[0031] The specific steps for operating the summer mode are as follows:

[0032] 1. Mode Selection: Rotate the No. 1 circulating pump operation knob on the electrical panel to the automatic position. The administrator logs in to enter the operation screen and clicks on temperature settings; clicks on the temperature mode selection button "Summer Selection", and the equipment will enter summer mode; when summer mode is selected, the primary side ice water outlet valve will open automatically.

[0033] 2. Temperature control parameter setting: Click the summer regulating valve automatic button, and the regulating valve will enter the summer automatic mode. Enter the target temperature, electric valve P value, I value, and secondary water supply temperature upper limit setting temperature. After setting, click the return button to enter the operation screen.

[0034] 3. Operation Settings: Click the "Operation Settings" button to enter the water pump settings screen; click the "Automatic Pure Water Circulation Pump" button, enter the frequency value, set the low limit setting value for pure water inlet pressure, the high limit setting value for outlet water pressure, and the protection parameters; after setting, click the "Back" button to enter the operation screen.

[0035] 4. Once the settings are complete, click the automatic operation button, and the device will start automatically.

[0036] 5. During automatic operation, click the automatic stop button to automatically stop the device.

[0037] 6. If an alarm fault occurs during automatic operation, the equipment will automatically stop.

[0038] The specific operating steps for the winter mode are similar to those for the summer mode. In the winter mode, the hot water circulation pump control knob needs to be turned to the automatic position, which will not be described in detail here.

[0039] The above are merely preferred embodiments of this disclosure and are not intended to limit this disclosure. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.

Claims

1. A device for raising and lowering the temperature of irrigation water suitable for use in a polyhouse greenhouse, characterized in that, The temperature rising and falling device comprises a heat exchanger, a secondary pure water side water inlet pipeline, a secondary pure water side water outlet pipeline, a primary hot water side water inlet pipeline, a primary ice water side water inlet pipeline, a primary hot water side water outlet pipeline and a primary ice water side water outlet pipeline. The secondary pure water side water inlet pipeline is connected with a secondary side water inlet of the heat exchanger, the secondary pure water side water outlet pipeline is connected with a secondary side water outlet of the heat exchanger, the primary hot water side water inlet pipeline is connected with a primary side hot water water inlet of the heat exchanger, the primary ice water side water inlet pipeline is connected with a primary side ice water water inlet of the heat exchanger, the primary hot water side water outlet pipeline is connected with a primary side hot water water outlet of the heat exchanger, and the primary ice water side water outlet pipeline is connected with a primary side ice water water outlet of the heat exchanger. RO pure water enters the heat exchanger through the secondary pure water side water inlet pipeline, exchanges heat with hot water passing through the primary hot water side water inlet pipeline or ice water passing through the primary ice water side water inlet pipeline through the heat exchanger, and is subjected to primary temperature rising and falling treatment, so that the heat-exchanged or cooled pure water flows out of the secondary pure water side water outlet pipeline, is introduced into a pure water tank and is used for irrigating plants in a greenhouse.

2. The device for raising and lowering the temperature of irrigation water for a greenhouse according to claim 1, characterized in that, A temperature meter and a pressure meter are arranged on the secondary pure water side water inlet pipeline, and the temperature meter and the pressure meter are connected with the secondary side water inlet of the heat exchanger respectively, so as to monitor the temperature and the pressure of the pure water entering the heat exchanger.

3. The device for raising and lowering the temperature of irrigation water suitable for use in a greenhouse according to claim 1, characterized in that, A temperature meter and a pressure meter are arranged on the secondary pure water side water outlet pipeline, and the temperature meter and the pressure meter are connected with the secondary side water outlet of the heat exchanger respectively, so as to monitor the temperature and the pressure of the pure water leaving the heat exchanger.

4. The device for raising and lowering the temperature of irrigation water for a greenhouse according to claim 1, characterized in that, A temperature meter, a pressure meter and an electric three-way valve are arranged on the primary hot water side water inlet pipeline and the primary ice water side water inlet pipeline, and the temperature meter and the pressure meter are connected with the primary side hot water water inlet and the primary side ice water water inlet of the heat exchanger respectively, so that the electric three-way valve is used for controlling the flow of the hot water and the ice water entering the heat exchanger.

5. The device for raising and lowering the temperature of irrigation water for a greenhouse according to claim 1, characterized in that, A temperature meter and a pressure meter are arranged on the primary hot water side water outlet pipeline and the primary ice water side water outlet pipeline, and the temperature meter and the pressure meter are connected with the primary side hot water water outlet and the primary side ice water water outlet of the heat exchanger respectively, so as to monitor the temperature and the pressure of the hot water and the ice water leaving the heat exchanger.

6. The device for raising and lowering the temperature of irrigation water suitable for use in a greenhouse according to claim 1, characterized in that, The heat exchanger is a plate heat exchanger, which has a plurality of heat exchange plates arranged in parallel, and fluid channels are formed between the heat exchange plates, so as to realize heat exchange between the primary side fluid and the secondary pure water side fluid.

7. The device for raising and lowering the temperature of irrigation water for a greenhouse according to claim 1, characterized in that, The primary hot water side water inlet pipeline and the primary ice water side water inlet pipeline are connected with different heat exchange medium storage tanks respectively, so as to adjust the temperature of the heat exchange medium entering the heat exchanger.

8. The device for raising and lowering the temperature of irrigation water for a greenhouse according to claim 1, characterized in that, The device comprises a connecting pipeline, wherein the primary hot water side water inlet pipeline and the primary ice water side water inlet pipeline are connected with the respective heat exchange medium storage tanks through the connecting pipeline, and the primary hot water side water outlet pipeline and the primary ice water side water outlet pipeline are connected with the corresponding water outlets of the heat exchanger through the connecting pipeline.

9. The device for raising and lowering the temperature of irrigation water for a greenhouse according to claim 1, characterized in that, The temperature rising and falling device further comprises an electric control system, which is installed on a modular installation base plate connected with the heat exchanger, so as to fix and support various components in the electric control system, and to control the electric three-way valve and the water pump by monitoring the sensor data in the temperature rising and falling device, so as to adjust the flow of the heat exchange medium and the pure water.

10. The device for raising and lowering the temperature of irrigation water suitable for use in a greenhouse according to claim 9, characterized in that, The electric control system also comprises a thermal management unit which monitors the temperature of the heat exchanger and ensures that the device is operated at an optimal temperature.

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